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2 years ago

15

Solve each using mental math.

1 answer:

S_A_V [24]2 years ago

6 0

T= 17

h= -7

x=12

b=9

Here’s all the answers.. may you put me as brainliest answerer? thanks !

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What are the variables in the expression x+8-y?

maksim [4K]

x and y i think, I haven't done that in a long time.

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3 years ago

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Jim drives his children to their sports activities outside of school. When he drives his son to baseball practice, it is a 6-km

trapecia [35]

Answer:

17.4 kilometers per week

Step-by-step explanation:

we know that

The number of kilometers that Jim drives a week is equal to the number of baseball practice multiplied by its round trip plus the number basketball practice multiplied by its round trip

Remember that

$1\ km=1,000\ m$

so

$1,800\ m=1,800/1,000=1.8\ km$

$2(6)+3(1.8)=17.4\ km$

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2 years ago

The graphed line shown below is y = -4x - 12

Irina-Kira [14]

<h2>Answer:</h2>

$\boxed{y=-4x}$

<h2>Step-by-step explanation:</h2>

A linear equation is an equation of a line while a system of linear equations contains two or more linear equations that work together. A system of two linear equation has no any solution when the lines have the same slope. The graphed line shown in the Figure has an equation $y=-4x-12$ being the slope $m=-4$ . Thus, from the options the line that has the same slope is $y=-4x$ . Finally, these two lines have no any because they are parallel.

4 0

3 years ago

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The price of a pedicure decreases by 4.2% from £36 on promotion.

maria [59]

A) 95.8 % of £36 will be the new price

B) The answer to part A as a decimal is £34.488

C) The new price is £34.488

<h3><u>Solution:</u></h3>

Given that the price of a pedicure decreases by 4.2% from £36 on promotion

<em><u>A) What percentage of £36 will the new price be ?</u></em>

Given that £36 is decreased by 4.2 %

New price = 36 – 4.2% of 36

$\begin{array}{l}{\text { New price }=36-\frac{4.2}{100} \times 36} \\\\ {\text { New price }=36-1.512} \\\\ {\text { New price }=34.488}\end{array}$

Now we have to find what percentage of £36 will the new price be

x % of 36 = 34.488

$\frac{x}{100} \times 36 = 34.488\\\\x = \frac{34.488 \times 100}{36} = 95.8 \%$

<em><u>B) Write your answer to part a as a decimal.</u></em>

Now, we have to find the new price in decimal form.

$\begin{array}{l}{95.8 \% \times 36 \rightarrow \frac{95.8}{100} \times 36} \\\\ {\rightarrow 0.958 \times 36=34.488}\end{array}$

<em><u>C) Work out the new price.</u></em>

As we calculated, the new price is £34.488

6 0

3 years ago

Select the correct answer.

BARSIC [14]

Answer:

D) 4x + 2y ≤ 25 , x + y ≥ 8 is the required system of inequalities

to represent the given situation.

Step-by-step explanation:

Here, let the number of color copies = x

Now, the time taken to print each color copy = 4 minutes

⇒Time taken to print x color copies = x times ( Time taken by each copy)

= 4 (x) = 4x

and let the number gray scale copies = y

The time taken to print each gray scale copy = 2 minutes

⇒Time taken to print y gray scale copy = y times (Time taken by each copy)

= 2 (y) = 2y

Total copies printed = x + y

Maximum time taken to print x color copies and y grayscale copies

= 4x + 2y

So, according to the question:

4x + 2y ≤ 25 ( as maximum allotted time is 25 minutes)

and x + y ≥ 8 (as minimum number of copies is 8)

hence, the above system is the required system of inequalities to represent the given situation.

7 0

2 years ago