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Montano1993 [528]

2 years ago

12

Which number goes in the box to make this a true number sentence? 7 × (3 + 9) = 21 +

2 answers:

Bumek [7]2 years ago

4 0

7(3 + 9) = 7(3) + 7(9) = 21 + 63

LekaFEV [45]2 years ago

4 0

The number that would go in the box is 63. 7X12=21+63

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Alexxx [7]

Answer:

7.1719764457194
is the answer

7 0

2 years ago

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Solve the system using elimination.<br><br> 2x + 3y = 17<br> x + 5y = 19

ale4655 [162]

$\left\{\begin{array}{ccc}2x+3y=17\\x+5y=19&|\text{multiply both sides by (-2)}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}2x+3y=17\\-2x-10y=-38\end{array}\right}\qquad\text{add both sides of equations}\\.\qquad\qquad-7y=-21\qquad\text{divide both sides by (-7)}\\.\qquad\qquad \boxed{y=3}\\\\\\\text{Substitute the value of y to the second equation}\\\\x+5(3)=19\\\\x=15=19\qquad\text{subtract 15 from both sides}\\\\\boxed{x=4}\\\\Answer:\ x=4\ and\ y=3.$

5 0

3 years ago

The money you earn varies directly with the number of lawns you mow. You earn $36 for mowing three lawns. a. Write an equation f

nika2105 [10]

Answer:

a. y = 36x, b. $252

Step-by-step explanation:

5 0

3 years ago

The measures of the angles in △ABC are given by the expressions in the table.

spayn [35]

Answer:

Part 1) $x=25$

Part 2) $m\angle B=65^o$

Part 3) $m\angle C=50^o$

Step-by-step explanation:

step 1

Find the value of x

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

so

In the triangle ABC

$m\angle A+m\angle B+m\angle C=180^o$

substitute the given values

$65^o+(3x-10)^o+(2x)^o=180^o$

Solve for x

$(5x+55)^o=180^o$

$5x=180-55\\5x=125\\x=25$

step 2

Find the measure of angle B

we know that

$m\angle B=(3x-10)^o$

substitute the value of x

$m\angle B=(3(25)-10)=65^o$

step 3

Find the measure of angle C

we know that

$m\angle C=(2x)^o$

substitute the value of x

4 0

3 years ago

Read 2 more answers

Anyone know the Answer?

Inessa05 [86]

Answer:

A

Step-by-step explanation:

sorry if wrong:)

8 0

2 years ago

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