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mrs_skeptik [129]
3 years ago
9

VERY URGENT, PLEASE HELP WITH ALGEBRA 1 MATH !!!!!!please look attachment​

Mathematics
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

x = 6

Step-by-step explanation:

y = -x - 4

3x + y = 8

Substitute the y with -x - 4

3x - x - 4 = 8

Combine the terms

2x - 4 = 8

Move the constant to the other side

2x - 4 = 8

    +4  +4

2x = 12

Divide both sides by 2

2x/2 = 12/2

x = 6

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Anyone know how to do this
Anton [14]

let

(hypotenuse ) c = 10 in

(perpendicular) a = 8 in

(base) b =?

By using Pythagoras theorem

c^2= a^2+b^2

(10)^2 = (8)^2 +(b)^2

100 = 64 +(b)^2

100- 64 = (b)^2

36 = (b)^2

√36 = b

6 = b

hence b= 6 in

3 0
3 years ago
20 if f(x) = 4x + 5, what is the value of f(-3)?<br> A-2<br> B-7<br> C 17<br> 04
Juliette [100K]

Answer:

B. -7

Step-by-step explanation:

f(x) = 4x + 5

To find the value of f(-3), replace all the x's in f(x) with -3.

f(x) = 4x + 5

f(-3) = 4(-3) + 5

f(-3) = -12 + 5

f(-3) = -7.

This makes your answer B, -7.

5 0
3 years ago
Trini rode her bike 12 miles on Friday. She rode 14 miles on Saturday and 15 miles on Sunday. How many miles did she ride in all
loris [4]

Answer: 41

Step-by-step explanation:

12+14+15= 41

4 0
2 years ago
Margie's car can go 32 32 miles on a gallon of gas, and gas currently costs 4 4 per gallon. How many miles can Margie drive on $
meriva
X=$20/$4
x=5 gallons

x is the amount of gallons.

1 gallon=32 miles
5 gallons=160 miles

Margie can drive 160 miles on $20 of gas

4 0
3 years ago
The diameter of a circle is 10 ft. Find the circumference to the nearest tenth to the nearest tenth. (Urgent)
Paul [167]

Answer:

31.42ft

Step-by-step explanation:

diameter = 10

radius = diameter ÷ 2

r = 10 ÷ 2

r= 5

Circumference = 2(pie)(r)

= 2(22÷7)(5)

= 31.42ft

6 0
2 years ago
Read 2 more answers
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