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2 years ago

If you can do all three questions I’ll mark you brainlest!! Thanks <3

Mathematics

2 answers:

uysha [10]2 years ago

8 0

Answer:

1) Rate: 3/2

Unit Rate: 1.5/1

Interpretation: Every 1 can of blue paint used requires 1.5 cans of white

paint

Solution: 9

Verdich [7]2 years ago

5 0

Answer:

1. Rate needed 9/6; Unit rate is 1.5/1; 1.5 cans of white paint are needed for each can of blue.

2. rate needed = 12/6; unit rate = 2/1; Need 2 cups of water for every scoop of fruit mix.

3. 70 minutes

Step-by-step explanation:

1. Set up a ratio

3white/2blue = xwhite/6blue

3/2 = x/6

cross multiply 2x = 18; x = 9

rate needed = 9/6

Unit rate is 1.5/1 (divide 3 by 2 or 9 by 6 to get unit rate_

2. 3/1.5 = x/6

1.5x = 18; x = 12

rate needed = 12/6

unit rate = 2/1

3. Set up a ratio.

3.5/.25 ( 1/4=.25)

3.5/.25 = x/5

.25x = 3.5(5)

.25x = 17.5

x = 70 minutes

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Please help me with this

pantera1 [17]

Answer:

8 3/4
2, 3
4 1/2, 11 1/4
9 3/4, 16 1/4
Y/B = 2/3

Step-by-step explanation:

The first line is simply the sum of the two given numbers.

3 1/2 +5 1/4 = (3+5) +(2/4+1/4) = 8 3/4

To find values on the remaining lines, it is convenient to find the ratios of the numbers involved. The ratio of yellow to blue is ...

Y/B = (3 1/2)/(5 1/4) = (7/2)/(21/4) = (7/2)(4/21) = 2/3

Then ...

Y : B : total = 2 : 3 : 5

This tells you the numbers on the second line are ...

Y = 2; B = 3

The value for B on the third line is the basic ratio number multiplied by (6 3/4)/3 = 2 1/4. Then the other two numbers are ...

Y = 2(2 1/4) = 4 1/2

total = 5(2 1/4) = 11 1/4

The value for Y on the fourth line is the basic ratio number multiplied by (6 1/2)/2 = 3 1/4. Then the other two numbers are ...

B = 3(3 1/4) = 9 3/4

total = 5(3 1/4) = 16 1/4

_____

The equation is the one we used to find the values on the second line:

Y/B = 2/3

7 0

2 years ago

2. Carl needs 15 hours longer than Jennifer to paint a room. If they work together, they can complete the job in 4 hours. Explai

nasty-shy [4]

Answer:

Jennifer would complete the job on her own in 5 hours.

Step-by-step explanation:

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}$

$\Delta = b^{2} - 4ac$

Rates

The together rate is the sum of their separates rate.

We have that:

Jennifer takes x hours to complete the job on her own, so her rate is 1/x.

Carl needs 15 hours longer than Jennifer, that is, 15 + x hours, so his rate is 1/(15+x).

The together rate is 1/4. So

$\frac{1}{4} = \frac{1}{x} + \frac{1}{15+x}$

$\frac{1}{4} = \frac{15 + x + x}{x(15+x)}$

$\frac{1}{4} = \frac{15 + 2x}{x(15+x)}$

Applying cross multiplication.

$x^2 + 15x = 4(15 + 2x)$

$x^2 + 15x = 60 + 8x$

$x^2 + 7x - 60 = 0$

Quadratic equation with $a = 1, b = 7, c = -60$ . So

$\Delta = 7^{2} - 4*1*60 = 289$

$x_{1} = \frac{-7 + \sqrt{289}}{2} = 5$

$x_{2} = \frac{-7 - \sqrt{289}}{2} = -12$

Since the time to complete the job has to be a positive value.

Jennifer would complete the job on her own in 5 hours.

4 0

2 years ago

Which is not a proportion???

frez [133]

The answer is C. C is not a proportion.

Hope this helps!

5 0

2 years ago

Read 2 more answers

HURRY PLZ WILL GIVE BRAINLIEST AND 50 POINTS What is the value of x in the equation 4 5+ਬ-* 2 - (4-5 - 7

Inessa05 [86]

Answer:

6 I think

Step-by-step explanation:

7 + 5(x - 3) = 22

7 + 5x - 15 = 22

7 + 5x = 37

5x = 30

x = 6

{ 6 }

3 0

3 years ago

The function h(t) = −5t2 + 25t shown in the graph models an architectural arch:

alukav5142 [94]

Answer:

the answer is actually 0 ≤ x ≤ 5

Step-by-step explanation:

i got it right

6 0

3 years ago