help me please I'll give you brainliest
Answer:
x means
Step-by-step explanation:
10x means that the x is something you would times to get the number you want which is 44 so 10 times x=4. hope this helped :)
Answer:
15
Step-by-step explanation:
2(8x - 23) = 10x + 44
16x - 46 = 10x + 44
6x = 90
x = 15
How many gallons of a 25% acid solution should be added to 10 gallons of a 12% acid solution to obtain a 20% acid solution?
Answer:
16 Gallons
Step-by-step explanation:
x = 25% gallon amount
.25 x + .12 (10) = .20 (10+x)
.05x = .8
x = 16 gal of 25%
The number of gallons of acid solution that should be added to 10 gallons of a 12% acid solution to obtain a 20% acid solution is 16.
What is the equation?An assertion that two mathematical expressions have equal values is known as an equation. An equation simply states that two things are equal. The equal to sign, or "=," is used to indicate it.
Given:
The percentage of acid in gallon solution = 25%,
The percentage of acid in 10 gallons = 12%
Suppose there are x total gallons,
Write the equation as shown below,
25% of (x - 10) + 12% of 10 = 20% of x
0.25 × (x - 10) + 0.12 × 10 = 0.2x
0.25x - 2.5 + 1.2 = 0.2x
0.25x - 0.2x = 2.5 - 1.2
x = 1.3 / 0.05
x = 26
Thus, the number of gallons of 25% acid solution = 26 - 10 = 16.
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Identify the expression 64^(1/2) shows the following number rewritten as a radical.
√(1/2&64)
√64
1/2 √64
8
Show your work.
Answer:
√64
Step-by-step explanation:
In mathematics, an expression involving the root (√) sign is regarded as a radical.
64^(1/2)
This is the same as;
√64
- √(1/2&64) This option is wrong.
- √64 This option is correct
- 1/2 √64 This option is wrong.
- 8 This option is wrong.
Write an equation to model the situation and
solve. (4 points)
14) Jill works at a cell phone store. Jill earns
$170 every week plus $65 for every phone
(p) that she sells. If Jill makes $625 at the
end of the week, how many phones did
she sell?
Equation:
Answer:
Step-by-step explanation:
I think 65 divided by 625 is 104 phones jill sold srry if I’m wrongI’m just a kid trying to figure out all this work
please help. It’s really easy just the question is worded weirdly and I don’t get it.
Answer:
d
Step-by-step explanation:
Can someone help? And show me how to get the answer please..
Answer:
2.6 in
Step-by-step explanation:
From the question given above, the following data were obtained:
Volume (V) of cylinder = 258¾ in³
Height (h) of cylinder = 12 in
Radius (r) =.?
NOTE: Pi (π) = 3.14
The radius of the cylinder can be obtained as follow:
V = πr²h
258¾ = 3.14 × r² × 12
258.75 = 37.68 × r²
Divide both side by 37.68
r² = 258.75 / 37.68
Take the square root of both side
r = √(258.75 / 37.68)
r = 2.6 in
Therefore, the radius of the cylinder is 2.6 in.
Average movie prices in the United States are, in general, lower than in other countries. It would cost $78.23 to buy three tickets in Japan plus two tickets in Switzerland. Three tickets in Switzerland plus two tickets in Japan would cost $74.02 . How much does an average movie ticket cost in each of these countries?
Answer:
In costs $17.19
Step-by-step explanation:
What does this fraction show or model what’s the answer I need help
Answer:
I belive that the answer is D because there is 2 items and if u count the different colors by 1 it would be 6
The slope is 2.
O True
O False
Answer:
false
Step-by-step explanation:
`Slope = [tex]\frac{rise}{run}[/tex] = [tex]\frac{-2}{1}[/tex]. So, it is false.
Answer:
False
Step-by-step explanation:
Slope = Change in y/ Change in x
=(1-3)/(2-1)
=-2
Find the square root of the following decimal numbers.
Answer:
[tex] \huge \boxed{ \tt i)1.6} \\ \huge \boxed{ \tt ii)4.3} \\ \huge \boxed{ \tt iii)8.3} \\ \huge \boxed{ \: \: \: \: \tt iv)9.2 \: \: \: }[/tex]
Step-by-step explanation:
to understand thisyou need to know about:square rootfinding square root by division methodconverting decimal to a fractionPEMDAStips and formulas:tips for finding square root by division method
Group the digits in pairs, starting with the digit in the units placeThink of the largest number whose square is equal to or just less than the first period. Take this number as the divisor and also as the quotient.Subtract the product of the divisor and the quotient from the first period and bring down the next period to the right of the remainder. the new divisor is obtained by taking two times the quotient and annexing with it a suitable digit which is also taken as the next digit of the quotient, chosen in such a way that the product of the new divisor and this digit is equal to or just less than the new dividend. Repeat steps till all the periods have been taken uptips for converting decimal to a fraction
Write down the decimal divided by 1Multiply both top and bottom by 10 for every number after the decimal pointreduce the fractionlet's solve:solve the square roots using division method:
the picture is attachedsolve the square roots by converting decimals into fraction:
[tex] \tt i) \sqrt{2.56} \\ \tt \sqrt{ \frac{256}{100} } \\ \tt \sqrt{ \frac{1 {6}^{2} }{ {10}^{2} } } \\ \tt\frac{16}{10} \\ \tt \: 1.6[/tex]
[tex] \tt ii) \sqrt{18.49} \\ \tt \sqrt{ \frac{1849}{100} } \\ \tt\sqrt{ \frac{ {43}^{2} }{ {10}^{2} } } \\ \tt \frac{43}{10} \\ \tt 4.3[/tex]
[tex] \tt iii) \sqrt{ 68.89} \\ \tt \sqrt{ \frac{6889}{100} } \\ \tt \sqrt{ \frac{ {83}^{2} }{ {10}^{2} } } \\ \tt \frac{83}{10} \\ \tt 8.3[/tex]
[tex] \tt iv) \sqrt{84.64} \\ \tt\sqrt{ \frac{8464}{100} } \\ \tt\sqrt{ \frac{ {92}^{2} }{ {10}^{2} } } \\ \tt \frac{92}{10} \\ \tt9.2[/tex]
Answer:
1.6
4.3
8.3
9.2
Step-by-step explanation:
Hope it is helpful....
Simplify.
34x−7+2(x−2)
Answer:36x-11
Step-by-step explanation:
Answer: 36x-11
34x-7+2(x-2)
34x-7+2x-4
36x-11
Step-by-step explanation:
Please help im confused
Answer:
1) 65.1
2) 3.4
Step-by-step explanation:
sorry I can't explain well but those are the answers
Answer:
Step-by-step explanation:
area of rectangle = 8×5 = 40 cm²
area of semicircle = ½×π4² = 8π cm²
total area = 40 + 8π ≅ 65.1 cm²
:::::
area of circle = π2² = 4π in²
area of square = 4⁴ = 16 in²
blue area = 16 - 4π ≅ 3.4 in²
Use the given information to find the measures of all angles formed by parallel lines a,b, and transversal m. The sum of two angels is 68 degrees
Answer:
There is not enough information to solve the problem.
Step-by-step explanation:
The question only gives the information that two angles are summing up to 68 degrees, but doesn't state what angles. As such, we can't determine any angles formed by parallel lines a and b, and transversal m.
Classify the following triangle Check all that apply.
12
YON
NA, obtuse
LM B salene
u Cequilateral
D. sosceles
E, acute
O Fright
Answer:
B and E
Step-by-step explanation:
✔️The triangle given has 3 unequal angles and 3 unequal side lengths. A scalene triangle has unequal angles and side lengths. Therefore, the triangle above is a scalene triangle.
✔️Each of the 3 angles of the triangle is less than 90°. An acute triangle has each of its 3 interior angles measuring less than 90°. Therefore the given triangle above is an acute triangle.
Suppose the half-life of a certain radioactive substance is 20 days and there are 50g present initially.
a)
Write an equation that models this situation.
b)
How much radioactive substance is remaining after 12 days?
c)
Find the time when there will be 1g of the substance remaining.
Answer:
a) 10(5g + 2r) weight loss over time
b) 20/12 = 1.66667 = 50 / 1.67 = 29.999 gm = 5(6g -1/50) or 5(5 + g) = 30g
c) 30g = 12 days = 3/5 therefore 5/5 -3/5 = 2/5 = 2/5 x 50 (g) = 20g in 8 days lost
8/20 = 0.4 loss each day 50g - 0.8g = 20-2 = 18 days.
Step-by-step explanation:
Solve and check the linear equation.
3(x-2) + 8 = 2(x + 5)
Answer:
x = 8
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightEquality Properties
Multiplication Property of EqualityDivision Property of EqualityAddition Property of EqualitySubtraction Property of EqualityAlgebra I
Terms/CoefficientsStep-by-step explanation:
Step 1: Define
3(x - 2) + 8 = 2(x + 5)
Step 2: Solve for x
(Parenthesis) Distribute: 3x - 6 + 8 = 2x + 10Combine like terms: 3x + 2 = 2x + 10{Subtraction Property of Equality] Subtract 2x on both sides: x + 2 = 10[Subtraction Property of Equality] Subtract 2 on both sides: x = 8Step 3: Check
Plug in x into the original equation to verify it's a solution.
Substitute in x: 3(8 - 2) + 8 = 2(8 + 5)(Parenthesis) Subtract/Add: 3(6) + 8 = 2(13)Multiply: 18 + 8 = 26Add: 26 = 26Here we see that 26 does indeed equal 26.
∴ x = 8 is the solution to the equation.
Find the value of x.
9514 1404 393
Answer:
120°
Step-by-step explanation:
There are several ways you can redraw this figure to help you find the value of x. One of them is to draw a line perpendicular to the parallel lines, intersecting the vertices of the given angles*. Then the interior angles of the triangle formed will be ...
125° -90° = 35°
115° -90° = 25°
The angle that is a vertical angle with x is the third angle of the triangle, so its measure is ...
x = 180° -35° -25° = 120°
The value of x is 120°.
Answer:
not sure
Step-by-step explanation:
QUICK HELP FIRST ONE TO ANSWER ILL MARK BRAINLIEST A rectangular prism has a square base whit a side length of 6 centimeters the height of the prism is 9 centimeters.what is the volume of the rectangular prism is cubic centimeters
Answer:
324 centimeters³
Step-by-step explanation:
The base is square so the length and width are both 6. The height is 9. The formula to solve a rectangular prism's volume is length x width x height. In this case it's 6 x 6 x 9. This is 324.
Hope it helps!
The product of two numbers is 110 the difference of two numbers is one what are the two numbers
Answer:
The correct answer is 10 and 11.
What is the slope-intercept form of the equation of the line parallel to the line in the graph that passes through the point (-1, 1)?
Answer:
undefined
Step-by-step explanation:
1. identify the corresponding sides on the figure below
What is the area of a circle whose radius is 50?
Answer:
area of circle=πr²=π50²=2500πunit²
I need help with this ion understand it
Answer:
c. 30
Step-by-step explanation:
Reference angle = [tex] /theta [/tex] = ?
Hypotenuse = 23
Adjacent side = 20
Thus, applying CAH:
[tex] Cos(/theta) = \frac{adj}{hyp} [/tex]
[tex] Cos(/theta) = \frac{20}{23} [/tex]
[tex] /theta = cos^{-1}(\frac{20}{23}) [/tex]
[tex] /theta = 29.5918458 [/tex] ≈ 30° (nearest degree)
A security keypad uses five digits (0 to 9) in a specific order. How many different keypad patterns are possible if the first 4 digits must be even and the last digit cannot be zero, one or two?
Number of possible codes =
Answer:
g
Step-by-step explanation:
A 1 km long train travelling at a speed of 60km/h enter a tunnel 1km long. What time will the train take to come out of the tunnel fully.
Answer:
2 minutes
Step-by-step explanation:
The front of the train enters the tunnel and travels 1 km before the rear of the train enters the tunnel. Thus, the total distance traveled by the front of the train is 2 km, and this is covered in a certain number of hours:
Since distance = rate times time, time = distance / rate. In this particular case we have:
2 km
time = distance / rate = ------------------- = (1/30) hr
60 km/hr
(1/30) hr converts to 2 minutes, since 1 hr = 60 minutes
Perchlorate is a chemical used in rocket fuel. People who live near a former rocket-testing site are concerned that perchlorate is present in unsafe amounts in their drinking water. Drinking water is considered safe when the average level of perchlorate is 24.5 parts per billion (ppb) or less. A random sample of 28 water sources in this area produces a mean perchlorate measure of 25.3 ppb. Which of the following is an appropriate alternative hypothesis that addresses their concern?
A) H: 25.3.
B) H: > 25.3.
C) H u <24.5.
D) Hu> 24.5. 27.
Answer:
[tex]H_1 : \mu > 24.5[/tex]
Step-by-step explanation:
From the given information:
The sample size is 28
The population mean is 24.5 (ppb)
The sample mean is 225.3 (ppb)
Thus, the null and the alternative hypothesis can be computed as:
Null hypothesis:
[tex]H_o : \mu \le 24.5[/tex]
Alternative hypothesis:
[tex]H_1 : \mu > 24.5[/tex]
The alternative hypothesis addresses their concern which is Hₐ: μ > 24.5. Then the correct option is D.
What are null hypotheses and alternative hypotheses?In null hypotheses, there is no relationship between the two phenomenons under the assumption or it is not associated with the group. And in alternative hypotheses, there is a relationship between the two chosen unknowns.
Perchlorate is a chemical used in rocket fuel.
People who live near a former rocket-testing site are concerned that perchlorate is present in unsafe amounts in their drinking water.
Drinking water is considered safe when the average level of perchlorate is 24.5 parts per billion (ppb) or less.
A random sample of 28 water sources in this area produces a mean perchlorate measure of 25.3 ppb.
The null hypotheses and alternative hypotheses can be given as
Null hypotheses
H₀: μ ≤ 24.5
Alternative hypotheses
Hₐ: μ > 24.5
More about the null hypotheses and alternative hypotheses link is given below.
https://brainly.com/question/9504281
can someone please help me with this math problem thank you.
Kevin draws out one M&M without looking.
· What is P(green)?
· What is P(red)?
· What is P(~Yellow)?
· What is P(~Orange)?
Answer:
1/6
Step-by-step explanation:
M&M comes in 6 colors.
So, P(green), = 1/6
P(red) = 1/6
· P(Yellow) = 1/6
· P(Orange) = 1/6
What is the possible value of k such that √50 and √k can be written as a single term?
The possible value of k such that √50 and √k can be written as a single term is; 50
Since √50 and √k are equal as described in the question;
√50 = √k.
The question requests that we determine What is the possible value of k such that √50 and √k can be written as a single term.
The possible value of k is therefore; 50.
Read more;
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A line passes through the points (4,9) and (12,20) what is the slope of the line?
Answer:
11/8
Step-by-step explanation:
[tex]slope = \frac{y_{2} - y_{1} }{x_{2} - x_{1} }[/tex]
20 - 9 = 11
12 - 4 = 8
slope = 11/8