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3 years ago

You have some trading cards. You give 21 cards to a friend and have 9 left for yourself.

Mathematics

1 answer:

Evgesh-ka [11]3 years ago

8 0

Answer:

Step-by-step explanation:

21 + 9 = 30

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For EASY BRAINLIEST!!! Answer: A. B. C. D. On both questions

tekilochka [14]

Answer:

8a) 3x

8b) 3 × x

8c) (2/3)x

8d) x/2

8e) 1/x

9a) 4x - 7

9b) x + 1/x

9c) 5(x + 2)

9d) x/(x + 4)

9e) (x/8) + x

4 0

3 years ago

Changle. Show all work. Round each length to the nearest tenth and each angle to the

Sedaia [141]

Answer:

Part 1) $BC=12.2\ units$

Part 2) $m\angle A=55^o$

Part 3) $m\angle C=35^o$

Step-by-step explanation:

Part 1) Find AC

we know that

In the right triangle ABC of the figure

Applying the Pythagorean Theorem

$AC^2=AB^2+BC^2$

substitute the given values

$AC^2=7^2+10^2$

$AC^2=149\\AC=12.2\ units$

Part 2) Find the measure of angle A

we know that

In the right triangle ABC

$tan(A)=\frac{BC}{AB}$ ----> by TOA (opposite side divided by the adjacent side)

substitute the values

$tan(A)=\frac{10}{7}$

using a calculator

$m\angle A=tan^{-1}(\frac{10}{7})=55^o$

Part 3) Find the measure of angle C

we know that

In the right triangle ABC

$m\angle A+m\angle C=90^o$ ----> by complementary angles

substitute the given value

$55^o+m\angle C=90^o$

$m\angle C=90^o-55^o=35^o$

8 0

3 years ago

The table shows the cost of renting a sound system for a concert. Isabel rents a sound system at 1 p.m. and plans to return it b

leonid [27]

Answer:

Step-by-step explanation:

its 56 b

3 0

3 years ago

Use a number line to show the sum of 6 + (–7).

mylen [45]

So there is a rule
(+)(+)=+
(-)(+)= -
(+)(-)= -
So now if you subtract 6 with 7 you will end up having -1 as you’re answer. Hope this helps

4 0

3 years ago

How do I do this? please help Im stuck on this and I cant understand the concept.

miskamm [114]

Answer:

take the total number of all x variables

6 0

3 years ago