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2 years ago

I can't figure out how to do -5+x/3=-11

Mathematics

1 answer:

-BARSIC- [3]2 years ago

3 0

Add 5 to both sides
5-5+x/3=5-11
0+x/3=-6
x/3=-6
times both sides by 3
3x/3=-18
x=-18

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Evaluate the expression \dfrac{7^2}{x^2-2} x 2 −2 7 2 start fraction, 7, squared, divided by, x, squared, minus, 2, end fracti

sertanlavr [38]

Answer:

Step-by-step explanation:

We want to evaluate the fraction below for x = 3. We will put the value of x to be 3:

$\dfrac{7^2}{x^2-2}\\\\= \dfrac{7^2}{3^2-2}\\\\= \dfrac{49}{9-2}\\\\= \dfrac{49}{7} = 7$

The answer is 7.

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3 years ago

Randy, Sandy and Todd are my cousins and their combined age is 87 years. Randy is four times as old as Sandy, but Todd is actual

NISA [10]

Answer:

Randy is 48 years old

Sandy is 12 years old

Todd is 27 years old

Step-by-step explanation:

Given

Represent their ages with the first letters of their names:

$R + S + T = 87$

$R = 4 * S$

$T = 15 + S$

Required

Determine their individual ages

We'll solve the above equations using substitution method of simultaneous equations

Substitute 15 + S for T and 4 * S for R in $R + S + T = 87$

This gives:

$4 * S + S + 15 + S = 87$

$4 S + S + 15 + S = 87$

Collect Like Terms

$4 S + S + S = 87 - 15$

$6S = 72$

Divide through by 6

$S = 72/6$

$S = 12$

This implies that Sandy is 12 years old

Substitute 12 for S in $R = 4 * S$ and $T = 15 + S$

$R = 4 * 12$

$R = 48$

$T = 15 + 12$

$T = 27$

This implies that Randy is 48 years old and Todd is 27

7 0

2 years ago

The length of a rectangle is three more than it’s width. the perimeter is 86 cm. Find the length and width of the rectangle. Wri

Mariana [72]

Half-perimeter=length+width=width+3+width=43, 2×width=40 so width=20cm and length=23cm.

6 0

3 years ago

PLEASE HELP ME ASAP! THANK YOU

Daniel [21]

Answer:

The area of the sector of the circle is approximately

Step-by-step explanation:

The given parameters of the circle having a shaded sector are;

The radius of the circle, r = 4 meters

The measure of the arc bounding the sector = 135°

The area of a sector of a circle, 'A', is given as follows;

$A = \dfrac{\theta}{360 ^{\circ}} \times \pi \times r^2$

Therefore, the area, 'A' of the given sector of the circle, is given as follows;

$A = \dfrac{135 ^{\circ}}{360 ^{\circ}} \times \pi \times (4\ cm)^2 \approx 18.85 \ cm^2$

The area of the sector of the circle, with radius 4 cm and bounded by an arc, A ≈ 18.82 cm².

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2 years ago

Ansha drove 45 MPH (miles per hour). How far can she go in 3 hours?

aleksley [76]

Answer:

135 miles.

Step-by-step explanation:

45 x 3= 135

6 0

2 years ago

Read 2 more answers