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3 years ago

Which is the completely factored form of 4x2 + 28x + 49?

Mathematics

1 answer:

Gelneren [198K]3 years ago

7 0

Answer:

57+28x

Step-by-step explanation:

only this

i don't know you 4x2 or 4x+2

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A woman earns $ 1,350 in interest from two accounts in one year. If she has three times as much invested at 7% as she does at 6%

VashaNatasha [74]

Answer:

The woman invested $15,000 at 7% interest rate and $5,000 at 6% interest rate.

Step-by-step explanation:

We are given the following in the question:

Let x be the interest earned from 7% interest rate and y be the interest earned from 6% interest rate.

The woman invested has three times as much invested at 7% as she does at 6%.

Thus, we can write the equation:

$x = 3y$

The total interest is $1,350.

Thus, we can write the equation:

$1350 = \dfrac{7x}{100} + \dfrac{6y}{100}\\\\7x + 6y = 135000$

Solving the two equations by substitution method:

$7(3y) + 6y = 135000\\27y = 135000\\y = 5000\\x = 3(5000) = 15000$

Thus, she invested $15,000 at 7% interest rate and $5,000 at 6% interest rate.

8 0

3 years ago

What are the solutions to the system y=x^2-6x+7 y=-x+13

dolphi86 [110]

I've attached the graphs to this answer. I hope they help.

3 0

3 years ago

Read 2 more answers

Simplify 5y^2 + 5y + 5y + 5x^2.

Ierofanga [76]

Answer:

5y^2 + 10y + 5x^2

Step-by-step explanation:

there's only two like terms that can be combined.

4 0

3 years ago

If a box of Crackers contain six servings and has a total of 450 calories, find the number of calories per serving

almond37 [142]

Answer:

Step-by-step explanation:

450/6 = 75

mark me brainllest

7 0

3 years ago

Find the ratio of the volume of one sphere to the volume of the right cylinder

yarga [219]

Answer:

Step-by-step explanation:

Let $r$ be the radius of one sphere.

Volume of sphere is $V=\frac{4}{3}\pi r^3$

Since radius is r, the height of the cylinder will be $4r$

Also, the cylinder has the same radius as the sphere: $r$

Volume of Cylinder is $V=\pi r^2 h$

Plugging in the values we get: $V=\pi (r)^{2}(4r)=4\pi r^3$

Ratio of volume of 1 sphere to volume of cylinder is:

$\frac{\frac{4}{3}\pi r^3}{4\pi r^3}=\frac{\frac{4}{3}}{4}=\frac{4}{3}*\frac{1}{4}=\frac{1}{3}$

The ratio is 1:3

Answer choice B is right.

5 0

3 years ago