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Dafna11 [192]
3 years ago
12

Ernesto tried to determine the solution for the system of equations using substitution. His work is shown below.

Mathematics
2 answers:
Nikolay [14]3 years ago
7 0

Answer:

Its actually STEP 3

The person above is incorrect :/

defon3 years ago
4 0
The answer is step 3. Step 2 is suppose to be 3 x 7 and the answer is 21 but he writes 7 in step 4
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AC = 16, AB = x + 1, and BC = x + 7. What is the measure of the length of AB? HELP
saveliy_v [14]

Answer:

5

Step-by-step explanation:

AC=AB+BC

so 16=x+1+x+7

which simplifies to 16=2x+8

subtract eight from both sides to get 8=2x

then divide by 2 to get that x=4

AB=x+1, which substitutes into 4+1=5

6 0
3 years ago
The ratio of the sides of two similar octagons is 2:5. What is the ratio of the perimeters of these octagons?
Tom [10]
So we see the ratio of the sides of two similar octagons is 2:5 so let's say the first octagon has a side of 2 and the other has a side of 5. 2*8 = 16 and 5*8 = 40. 16:40 = 4:10 = and is again 2:5. So the answer is 2:5.
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3 years ago
Completely Factor 2n^2-23n+45=0
Anton [14]

Answer:

x=5/2, 9

Step-by-step explanation:

3 0
3 years ago
What is the inverse of the function f(x) = x +3?
skelet666 [1.2K]
F(x) = x + 3
y = x + 3
x = y - 3

Inverse is h(x) = x - 3
7 0
3 years ago
Read 2 more answers
3w-4z=8<br> 2w+3z=-6 solve
marissa [1.9K]

Answer:

W = 0

Z = -2

Step-by-step explanation:

While simplyfying the equation, i noticed that one is 24 and the other is -24, which meant that one value is non existent, and after i found out that w = 0 imputing the reslut made that easier

4 0
3 years ago
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