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nekit [7.7K]
3 years ago
9

Which expression is equivalent to 56 + 21?

Mathematics
1 answer:
Ghella [55]3 years ago
3 0
If the last one is supposed to be 7(8+3), it would be equivalent to 56+21
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Which equation shows the substitution method being used to solve the system of linear equations?
svet-max [94.6K]
The equation
(y + 5) + y = 6
shows the substitution method being used to solve the system of linear equations. So the correct option among all the options given in the question is option "D".
For a better explanation, let us first write down the two equations given in the question.
x + 5 = 6
and
x = y + 5
Now the thing that has been done is that the value of x in the first equation has been replaced by the value of x that is given in the second equation. this is actually the substitution method of solving equations.
6 0
3 years ago
Read 2 more answers
WILL GIVE BRAINIEST AND 20 POINTS AND 5 STARS !! NEED HELP ASAP, PLEASE EXPLAIN STEP BY STEP.Kole works in an electronic store.
lord [1]

Answer:

0.42

Step-by-step explanation:

move the decimal point 2 to the left

6 0
3 years ago
Which expression is equivalent to (7x^2-4)(5x+7)
zepelin [54]

Expand to get 35x^3+49x^2-20x-28


8 0
3 years ago
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HELPPP please thank you so much
slavikrds [6]

Answer:

Inequality: 8p ≤ 50

Answer: p ≤ 6

Step-by-step explanation:

Step 1. Write an equation

$8 per person = 8p (where 8 is the cost per person and p is the number of people)

8p ≤ 50

Step 2. Solve

8p ≤ 50

÷8    ÷8

p ≤ 6.25 ≈ p ≤ 6 (your final answer is 6 because you cannot have 1/4 of a friend)

8 0
3 years ago
Can someone help me with this page
Ksju [112]
The first one is A. Number 2 is d. Number 3 is b because 20x20=400 and 21x21=441 and when you add them together you get 841 or 29x29. Number 4 is b because complementary angles are also right angles, they have to add up to 90 degrees. Number 5 is a because every angle is less than 90 degree. Number 6 is 30 because 60+90+x = 180 and when you solve for x you will get 30 degrees.
7 0
3 years ago
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