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pickupchik [31]
4 years ago
14

Solve for x -7 - 4 (2x - 1) = 21

Mathematics
1 answer:
Misha Larkins [42]4 years ago
7 0

Answer:

x=-3

Step-by-step explanation:

-7-4(2x-1)=21

-7-8x+4=21

-7+4-8x=21

-3-8x=21

8x=-3-21

8x=-24

x=-24/8

x=-3

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A painter charges by the square foot and charges you $1,875 to paint a 750 square foot rental house. If you need 1300 square foo
Stella [2.4K]

In this question , it is given that

A painter charges by the square foot and charges you $1,875 to paint a 750 square foot rental house.

For 750 square foot, he charges $1875.

So for 1 square foot, he charges

= \frac{1875}{750} = $2.50 \ \per \ square \ foot

And for 1300 square foot, he charges

= 2.50*1300 = $3250

3 0
3 years ago
Al saves pennies. He agreed to give 3/7 of his pennies to Bev if she would give 3/7 of what she got from Al to Carl and if Carl
ser-zykov [4K]

Answer:

2744 pennies.

Step-by-step explanation:

Let x represent the number of pennies Al have initially.

We have been given that Al agreed to give 3/7 of his pennies to Bev, so number of pennies Bev will get would be \frac{3}{7}x.

We are also told that Bev gave 3/7 of what she got from Al to Carl, so number of pennies that Carl will get would be \frac{3}{7}x\cdot \frac{3}{7}=\frac{9}{49}x.

Further, Carl gave 3/7 of what he got from Bev to Dani, so number of pennies that Dani will get would be \frac{9}{49}x\cdot \frac{3}{7}=\frac{27}{343}x.

We are also told that Dani received 216 pennies. Now, we will equate 216 to \frac{27}{343}x and solve for x as shown below:

\frac{27x}{343}=216

\frac{27x}{343}*343=216*343

27x=74088

\frac{27x}{27}=\frac{74088}{27}

x=2744

Therefore, Al have 2744 pennies initially.

3 0
3 years ago
Find The Sum. 6 2/3 + 1 5/6=
patriot [66]
6 2/3 + 1 5/6 = 8 1/2

i am a mathematics teacher. if anything to ask please pm me
5 0
3 years ago
Read 2 more answers
Identify the vertex and axis of symmetry.<br> f(x) = 3(x+7)²-5
Verizon [17]

Answer:

haiii i can only solve for the vertex...

Step-by-step explanation:

so to find the vertex you have to make it to

y - h = a(x - k)^2

i think

(you could also just make it y = a(x - k)^2 + h but i like the second one better)

soo

y + 5 = 3(x + 7)^2

the vertex is

(-7, -5)

and ummm i think the axis for the axis of symmetry .ss

x = 2a/b but im not sure

5 0
2 years ago
Read 2 more answers
1) Abdul uses 2 cups of milk to make a chocolate pudding cake. How many of these cakes
myrzilka [38]

Answer:

Step-by-step explanation:

so there are 16 cups in a gallon

in 3 gallons there are 48 cups

48/2=24

he can make 24 chocolate pudding cakes

6 0
2 years ago
Read 2 more answers
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