All categories

2 years ago

Simply the expression a = -3; b = 9 -7a + 4b 46? -15? 15? 57?

Mathematics

1 answer:

7nadin3 [17]2 years ago

6 0

Answer:

Step-by-step explanation:

-7a + 4b

Let a = -3 b = 9

Substitute the values in

-7(-3) + 4(9)

Multiply

21 + 36

Add

You might be interested in

Ms. Ari buys and sells diamonds. She has a diamond that weighs 1.825 carats. What id the weight of Ms. Ari's diamonds rounded to

FrozenT [24]

The answer is C~1.83 carats. I hope I helped!

6 0

4 years ago

The expression

nika2105 [10]

Step-by-step explanation:

please mark my answer as brainlest

5 0

3 years ago

Your Turn: Using the figure, a

Hatshy [7]

We are given:
$\frac{a}{c} = \frac{d}{a}$

First step is to get rid of fractions. We start by multiplying both sides by a.
$\frac{a}{c} = \frac{d}{a} /*a \\$

Now we cancel a on right side and we multiply both sides by c.
$\frac{ a^{2}}{c} = \frac{da}{a} /*c \\ \frac{ a^{2}c}{c} = dc$

After canceling c on the right side we are left with:
$a^{2} = dc or a^{2} = cd$

8 0

4 years ago

1. (x - 2)/ 4 - (3x + 5)/7 = - 3, x = ?

Reika [66]

Answer:

x = 10
B. 3/7

Step-by-step explanation:

1. (x - 2)/ 4 - (3x + 5)/7 = - 3

7(x -2) -4(3x +5) = -84 . . . . . . . multiply by 28

7x -14 -12x -20 = -84 . . . . . . . . eliminate parentheses

-5x -34 = -84 . . . . . . . . . . . . . . collect terms

-5x = -50 . . . . . . . . add 34

x = 10 . . . . . . . . . . . divide by -5

2. 1/(1 + 1/(1 - 1/x)) = 4

1 = 4(1 +1/(1 -1/x)) . . . . multiply by the denominator

-3 = 4/(1 -1/x) . . . . . . . eliminate outer parentheses, subtract 4

-3(1 -1/x) = 4 . . . . . . . multiply by the denominator

-3 +3/x = 4 . . . . . . . . eliminate parentheses

3/x = 7 . . . . . . . . . . . add 3

x = 3/7 . . . . . . . . . . . multiply by x/7

6 0

3 years ago

PLEASE ASAPPPPP I NEED ITTTT

Pachacha [2.7K]

Do you know the equation to use

6 0

2 years ago