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3 years ago

Suppose you cannot remember the answer to 15-8=7. What could you do to solve?

2 answers:

3 0

You can think in reverse. Addition is the opposite of subtraction. So to solve 15-8, you can ask "8 plus what number is equal to 15?" and note how 8+7 = 15. So that's why 15-8 = 7. Similarly, 15-7 = 8 can be solved the same way.

Delvig [45]3 years ago

3 0

Calculate either in your head or on a paper what plus 8 equals 15, you can solve it easily this way. It is probably easier to do in your head (9, 10, 11, ...), continue on and make sure to remember how much is the sum.

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The sum of two numbers is 24. One number is four less than the other. Find the numbers.

Alika [10]

Answer:

The correct answer is 10 and 14

5 0

2 years ago

I need this ASAP MY TEACHER KEEPS CONTACTING ME PLZ HELP Combine like terms: 9x+8y-4x-2y9x+8y−4x−2y

adelina 88 [10]

Answer:

If the expression is 2y+9x the answer is: 10x+12y

If the expression is 2y-9x the answer is -8x+12y

Step-by-step explanation:

You would combine all your x values:-4,9,9,-4 and that equals 10 then you would add your variable, so your x value is 10x.

You would then combine all your y values: 8,-2,8,-2, and that equals 12, then you would add your variable, so your y value is 12y.

8 0

2 years ago

Read 2 more answers

What is the value of the expression 11 − ( 1/2 )4 ⋅ 48?

alisha [4.7K]

11-2×48= 412. So the value of the expression is 412.

7 0

3 years ago

In ΔUVW, w = 3 inches, ∠W=23° and ∠U=73°. Find the length of u, to the nearest 10th of an inch.

kirza4 [7]

Answer:

<h2>7.4inches</h2>

Step-by-step explanation:

Check the attachment for the diagram. Sine rule will be used to get the unknown side of the triangle.

According to the rule;

$\frac{u}{sinU} = \frac{v}{sinV} = \frac{w}{sinW}\\\frac{u}{sinU} = \frac{w}{sinW}$

Given w = 3 in, ∠W=23° and ∠U=73°, on substituting into the equation above to get u we have;

$\frac{u}{sin73^{0} } = \frac{3}{sin23^{0} }\\usin23^{0} = 3sin73^{0}\\u = \frac{3sin73^{0} }{sin23^{0} }\\u = \frac{2.87}{0.39} \\u = 7.358\\u = 7.4in$

The length of u is 7.4inches to nearest 10th of an inch

6 0

3 years ago

To use distributive property solve equation 2(a+3)=-12

WARRIOR [948]

Answer: a= -18/2

Step-by-step explanation:

2a + 2x3 = -12

2a + 6 = -12

2a + 6 - 6 = -12 - 6 ( subtract 6 from both sides)

2a = -18 (Divide 2 by both sides)

a= -18/2

4 0

3 years ago