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3 years ago

Which expressions are equivalent to 78 • 7? Select all that apply. HINT: There are 3 correct answers.

Mathematics

2 answers:

Snezhnost [94]3 years ago

8 0

Answer:

None because 78 * 7 = 546

Step-by-step explanation:

shepuryov [24]3 years ago

8 0

I only got the answer for d

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In a parallel circuit, the supply voltage is 120 V, 60 Hz. The resistance is 30 Ω and the inductive reactance is 40 Ω. What is t

kvasek [131]

Given : supply voltage = 120V;60 Hz

Inductive Reactance $(X_{L}) = 40$ Ω

The inductive reactance is given by the formula, $X_{L}=Lw$ , where L is inductance and $w$ is given by formula, $w = 2\pi(frequency)$

Apply this, we can say that, $L = \frac{X_{L}}{2\pi (frequency)} = \frac{40}{2(3.14)(60)} = 0.106157 H = 106.157 mH$

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3 years ago

Solve this quadratic equation.<br> x2 + 5x + 3 = 0

Xelga [282]

Answer:

Step-by-step explanation:

2x+5x+3=0

7x+3=0

-3 -3

=0 =-3

7x=-3

-3/7=-0.42857142857

x=-0.42857142857

I think it is right

3 0

2 years ago

UVOISINOULLIV HU

Gala2k [10]

<h3>Total snow fall for three days is 8.75 inches</h3>

<em><u>Solution:</u></em>

Given that,

Snow fell over the past three days

$First\ day = 3\frac{2}{4}\ inches = \frac{14}{4}\ inches\\\\Second\ day = 3\frac{2}{4}\ inches = \frac{14}{4}\ inches\\\\Third\ day = 1\frac{3}{4}\ inches = \frac{7}{4}\ inches$

<em><u>What was the total snowfall for the three days?</u></em>

Total snowfall = first day + second day + third day

$Total\ snowfall = \frac{14}{4} + \frac{14}{4} + \frac{7}{4}\\\\Total\ snowfall = \frac{14 + 14 + 7}{4}\\\\Total\ snowfall = \frac{35}{4} \text{ or } 8.75\ inches$

Thus total snow fall for three days is 8.75 inches

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3 years ago

Identify the graph of f(x)=4^x

Wittaler [7]

Answer:

the first one

Step-by-step explanation:

The correct one is the one in the top left corner.

A great website to find out things like this is

https://www.mathpapa.com/algebra-calculator.html

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3 years ago

Four int variables, x1, x2, y1, and y2, have been declared and been given values. write an expression whose value is the differe

Katen [24]

Even though we are using variables, we still know that "difference" means subtraction. So, if the larger is x1 and x2, those variables go first. The smaller, y1 and y2 will go second. So our problem will look like this:

(x1 < x2 ? x2 : x1) - (y1 < y2 ? y1 : y2)

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3 years ago