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Wittaler [7]
3 years ago
5

Brett earned scores of 74, 90, and 84 on his first three quizzes this term. What score

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

Answer:

92

Step-by-step explanation:

(74 + 90 + 84 + 92) / 4 = 85

kozerog [31]3 years ago
4 0

Answer:

x ≥ 92

Step-by-step explanation:

let 'x' = necessary score

(74 + 90 + 84 + x) / 4 ≥ 85

(248 + x) / 4 ≥ 85

cross-multiply:

248 + x ≥ 340

x ≥ 92

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Avery deposited $400 in an account that earned 2.47% interest compounded annually. She did not make additional deposits or withd
aev [14]

Answer:

Amount ($451.9), Interest ($51.9)

Step-by-step explanation:

We need to use the formula of A = P(1 + \frac{r}{n})^n*t

A = Total Amount

P = Principle/Deposited money

R = Annual Interest Rate

N = Number of times compounder per year

T = time in years

We have P = $400, r = 2.47%, n = 1 and t = 5 years.

Now lets plug it all in!

A = 400 (1 + \frac{0.0247}{1})^{1*5}

A = 400 * 1.0247^5

A = 400 * 1.129753

A = 451.9

Now we need to find the interest...

We will use A = P + I since A is 451.9 and P = 400

451.9 = 400 + I

I = 451.9 - 400

I = 51.9

6 0
2 years ago
Can you help me with this question please?
katovenus [111]

V = (1/2) area of cross-section times length.

Note: I will use L in place of x to represent the length of the prism.

In short, V = (1/2)*b*h*L.

To find the surface area, use

A = bh + 2Ls + Lb

Volume given to be 15, 510.

Part (a) set up:

15, 510 = (1/2)(60)(11)L

Can you finish? Just solve for L to find your x-value.

Part (b) set up:

To answer part (b), you must find the value of L in part (a).

A = (60)(11) + 2L(61) + L(60)

Understand? Take it from here.

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3 years ago
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