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borishaifa [10]

3 years ago

9

The sum of two numbers is 23. The larger number y is 1 less than twice the smaller number x. Write and solve a system of linear

equations to find the two numbers.

1 answer:

krok68 [10]3 years ago

5 0

Answer:

15 and 8

Step-by-step explanation:

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The answer is C that’s why it has a 1 pt in front <br><br> Plz just help me explain how to get that

Ierofanga [76]

First lets get the formula for a triangular prism

$v =( \frac{1}{2} bh)h$

First lets plug in our numbers

$v =( \frac{1}{2} \times 7 \times 4)8.5$

It really doesnt matter how you multiply everything, but you end up with 119cubic feet.

3 0

3 years ago

SOLVE <br><br> x + 3y = -1<br><br> y = x - 7<br><br><br><br><br><br> Write the solution below.

ki77a [65]

Answer:

x= 5 ........................ .......

7 0

2 years ago

In which step did Viet make an error?

Yuri [45]

Answer:

Step 1

Step-by-step explanation:

When moving the 4 to the other side, Viet was supposed to subtract 4 from each side, leaving 0 on the left, and 102-4 on the other side. 102-4=98, not 106. Viet added when he was supposed to subtract.

8 0

3 years ago

Find the volume. Round to the nearest tenth.<br> 20m<br> 5 m<br> 18 m

Thepotemich [5.8K]

The answer is 1800 because you have to follow the formula for volume which is
Volume=Length x Width x Height
1800= 18m x 5m x 20m

5 0

3 years ago

PLEASE HELP!!!!!!!!!

kolezko [41]

Let $x_1 , x_2$ be the roots of the equation $3x^2-5x-7$ . By the Viet theorem you have that $\left \{ {{x_1+x_2=- \frac{5}{3} } \atop {x_1x_2= \frac{-7}{3} }} \right.$ .

For the equation $x^2+bx+c = 0$ you'll have that $c=(x_1+2)(x_2+2)=x_1x_2+2(x_1+x_2)+4=\frac{-7}{3}+2\cdot(- \frac{5}{3} )+4$
That is $\frac{-7}{3}- \frac{10}{3} +4=- \frac{5}{3}$ .

Answer: $- \frac{5}{3}$

4 0

3 years ago