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3 years ago

This is 7th grade math..........

Mathematics

1 answer:

e-lub [12.9K]3 years ago

3 0

Answer:

Step-by-step explanation:

Okay here's my reasoning:

they are telling us that 3 and 5 put together is 8. While this could be either A or D, this question has already told us that it equals 8. This equation is basically more better suited to 8=3+5 because this is show that 8 can be found by putting 3 and 5 together.

Hope this helps!

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(a) Work out 8 × 1/1/1 x 3 Give your answer as a mixed numbers

Mama L [17]

Answer:

well.. 1/1/1 would be 1.

8 x 3 = 24

24x 1 = 24

sooo the answer would be 24...

Step-by-step explanation:

3 0

2 years ago

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Amal worked a total of 30 hours last week on Saturday and Sunday he worked 5 times and many hora than he worked the rest of the

aleksley [76]

6 because 30 divided by5 is 6

7 0

4 years ago

Part A: Solve −np − 70 < 40 for n. Show your work. (4 points) Part B: Solve 4w − 7k = 28 for k. Show your work.

kondaur [170]

Hey!

For part A, let's write the problem,
$-np-70\ \textless \ 40$
Add $70$ to both sides...
$-np-70+70\ \textless \ 40+70$
$-np\ \textless \ 110$
We are going to reverse the inequality, to do this we are going to multiply both sides by $-1$ .
$\left(-np\right)\left(-1\right)\ \textgreater \ 110\left(-1\right)$
$pn\ \textgreater \ -110$
Divide both sides by $p$ .
$\frac{pn}{p}\ \textgreater \ \frac{-110}{p}$
Our answer would be,
$n\ \textgreater \ -\frac{110}{p}$

Let's go with Part B. Let's write the problem,
$4w-7k=28$
Subtract $4w$ from both sides,
$4w-7k-4w=28-4w$
$-7k=28-4w$
Divide both sides by $-7$ .
$\frac{-7k}{-7}=\frac{28}{-7}-\frac{4w}{-7}$
If we simplified it, we would be left with,
$k=-\frac{28-4w}{7}$

Thanks!
-TetraFish

4 0

3 years ago

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. The support post is 15 f

dezoksy [38]

Answer:

21 ft

Step-by-step explanation:

We are given that the support post is 10 ft tall.

Let x represents the distance between the support post and the front of the house, that means that 25-x will be the distance from back.

By Geometric Mean Theorem, the length of the altitude to the hypotenuse of a right triangle is the geometric mean of the lengths of the segments of the hypotenuse.

So, by the previous Theorem, we get:

$\frac{25}{10} =\frac{10}{x} \\25x=100\\x=100:25\\x=4$

We got that the distance between the support post and the front of the house is 4 ft, while the distance between the support post and the back of the house is $25-4=21$ ft.

3 0

3 years ago

-10 (-2) ummmm im failing and need help

lianna [129]

Answer:

Step-by-step explanation:

a negative times a negative is a positive

6 0

3 years ago

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