What is the value of b? –7b = –42

Answers

Answer 1

Answer: for this question you can just divide the both sides by -7 so you gonna have :
-7b/-7 = -42/-7 ⇒ b = 6 :)))
i hope this is helpful
have a nice day

Answer 2

Answer: $-7b = -42\n\nb = (-42)/(-7)\n\n\boxed{\bf{b = 6}}$

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Given the following functions f(x) and g(x), solve (f + g)(3) and select the correct answer below:f(x) = 6x + 3 g(x) = x − 7 4 17 25 31
Katie types 600 words in 5 minutes. She compared her typing speed to the record typing speed for her school shown in the table.Choose the answer that correctly compares Katie’s typing speed to the record typing speed for her school. Question options: A.) Katie types slower than the school record speed. B.) Katie types faster than the school record speed. C.) Katie’s typing rate is the same as the record speed for her school.
Which statement is true??
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If a square had a perimeter of 78.4. What is the length of each side

Answers

We know that all the sides of a square is Equal.
And we also know that a square has 4 sides.
So we take the measurement of the perimeter, which is 78.4 and divide it by 4, which is the number of sides.
to find the length of each side= $(78.4)/(4)$
= 19.6

In conclusion 19.6 units is the length of each side.
Note: if the unit of measurement is given(for e.g: in,m,cm...), we have to include it.
Quick Check: 19.6+19.6+19.6+19.6=78.4

Which shows a perfect square trinomial?50y2 – 4x2
100 – 36x2y2
16x2 + 24xy + 9y2
49x2 – 70xy + 10y2

Answers

Answer:

C. $16x^2+24xy+9y^2$

Step-by-step explanation:

We have been given 4 expressions and we are asked to choose the expression that is a perfect square trinomial.

We know that a perfect square trinomial is in form: $a^2+2ab+b^2$ .

Upon looking at our given choices we can see that option C is the correct choice as we can write as:

$16x^2+24xy+9y^2=(4x)^2+2(4x\cdot 3y)+(3y)^2$

$16x^2+24xy+9y^2=(4x)^2+2(12xy)+(3y)^2$

$16x^2+24xy+9y^2=(4x)^2+24xy+(3y)^2$

Therefore, option C is the correct choice.

A perfect square trinomial is found in the expression where both the leading coefficients and the constant are both perfect squares. That only is the case with the third choice above. 16 is a perfect square of 4 times 4, and 9 is a perfect square of 3 times 3. We need to set it up into its perfect square factors and FOIL to make sure, so let's do that. Not only is 16 a perfect square in that first term, but so is x-squared. Not only is 9 a perfect square in the third term, but so is y-squared. So our factors will look like this:

(4x + 3y)(4x + 3y). FOIL that out to see that it does in fact give you back the polynomial that is the third choice down.

What is the density ?

Answers

Density is the degree of compactness of a substance. It is the degree of consistency measured by the quantity of mass per unit volume. It is the relationship between the mass of the substance and the amount of space it takes up. I hope it helps.

The mass of substance per unit of volume.

GIVING BRAINIESTThe time it takes to travel a fixed distance varies inversely with the speed traveled. If it takes Pam 1.5 hours to bike to her fishing spot at 9 miles per hour (how long will it take her if she rides at 12 miles per hour?

Answers

Answer:

Takes her 2 hours

Step-by-step explanation:

Need help please....

Answers

To solve this or to simplify it simply divide both the top and bottom terms. In the quotient.

By dividing each term with the correct similar variable, you can simplify the expression.

2x - 3y would be the final answer.

Tree pruning company A charges a one time $100 fee and $50 for each tree that they prune. Tree pruning company B charges a one time $80 fee and $60 for each tree that they prune.Let the variable t represent the amount trees pruned and c represent the cost. For how many pruned trees will the cost be the same for both companies?

Which system of equations can be used to solve this problem?

A. {c=150t
c=140t

B. {c=100−50t
c=80−60t

C.{c=100+50t
c=80+60t

D. {c=50+100t
c=60+80t

Answers

The answer to this question should be C

if you put the onetime fee as y intercept and rate as slope you will get the answer.

A: y=50x+100
B: y=60x+80

use desmos and the intersection is when the prices become the same

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Given the polynomial 2x3 + 18x2 − 18x − 162, what is the value of the coefficient 'k' in the factored form?2x3 + 18x2 − 18x − 162 = 2(x + k)(x − k)(x + 9) k= ____________

What is the solution to the linear equation?4b + 6 = 2 – b + 4

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The diagram shows three squares that are joined at vertices to form a right triangle. Which statement is true? A. The sum of the areas of Square N and Square L is equal to the area of Square K. B. The sum of the areas of Square N and Square L is greater than the area of Square K. C. The sum of the areas of Square N and Square K is equal to the area of Square L. D. The sum of the areas of Square N and Square K is less than the area of Square L.